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Color Vision Simulator Examples

Vischeck's color vision model allows you to simulate
how the world looks to people with various sorts of color deficiency.
As you can see from these examples, 'color blindness' is really a
misnomer- most 'color blind' people do in fact see colors! The
colors seen may be different than those seen by someone with normal
color vision. Also, people with color deficiencies may see certain
colors (like red and green) as very similar, while someone with
normal color vision sees them as quite dissimilar.
(Complete color blindness does occur, but is quite rare.)

How the world looks to a person
with a red/green color deficit (deuteranopia).

How the world looks to a person
with a blue/yellow color deficit (tritanopia).

Some colorful hats.

As seen by a person with
deuteranopia.

As seen by a person with protanopia,
another form of red/green deficit.

This is an Ishihara plate commonly used to
check for red/green color blindness

This is what a red/green color-blind person
might see. Note that the digit (3) is practically invisible.

People with color deficiencies may have difficulty distinguishing
certain colors (e.g., a red/green color deficiency means that reds
and greens are more difficult to distinguish). But as this
photo demonstrates, many other colors are just as distinguishable
to a person with a color deficiency as to someone with normal color
vision.